I didn't know this till they came in the mail, but Summit's 3" 45 degree piping comes with flared ends, so you can rotate or even clamp them in place if you choose not to weld.
But all you need is a tight 90 for the turbo, and two 45 degree pipes.
Here are some pics.
And now I finally have a muffler on the car.
Just felt like sharing.
Since I have a pretty decent template now, I might think about making these for people.